As someone who plays both FFXIV and WoW, I think the term "endgame" is deceptively subjective.

I have different views on where the endgame lies in both games. For WoW, I see raiding as the endgame. It's literally "the thing you do at the end of the game". It wraps up whatever storyline is going on (sort of), and gives a challenge for max-leveled, high ilevel players. World quests and things like Island Expeditions and M+ are what I refer to as my "WoW chores". They're things I feel compelled to do, not because I enjoy them, but because if I don't do them, then I'll fall behind my raid team.

In FFXIV, however, I don't really see the game as having an "end", therefore I have trouble defining an "endgame" for it. The reason for this is simple: hitting max level/max gear isn't the end. Because I can subsequently go back and level every other job on the same character, that means I can leave low level sidequests alone, and they'll still have value after my main job is at the max. Similarly, there is the fact that I can go back and level other jobs on the same character. I don't have to start over and do the same quests I did to level my first job if I want to give a different role a try. I can have an entirely different adventure or (if I'm feeling lazy) I can just do my daily roulettes for a couple of months (total of maybe 6 hours a day if you include time spent just sitting around in queues for dps jobs) and have a new job geared up and ready to roll by the time I finish leveling it. No waiting around on RNG for gear to drop. And I never feel like the game is "ended".